<template>
  <div class="app-container">
    讲师添加
    <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name" />
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number
          v-model="teacher.sort"
          controls-position="right"
          min="0"
        />
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <!--
            数据类型一定要和取出的json中的一致，否则没法回填
            因此，这里value使用动态绑定的值，保证其数据类型是number
          -->
          <el-option :value="1" label="高级讲师" />
          <el-option :value="2" label="首席讲师" />
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career" />
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea" />
      </el-form-item>

      <!-- 讲师头像：TODO -->

      <!-- 讲师头像 -->
        <el-form-item label="讲师头像">
            <!-- 头衔缩略图 -->
            <pan-thumb :image="teacher.avatar"/>
            <!-- 文件上传按钮 -->
            <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像
            </el-button>
            <!--
        v-show：是否显示上传组件
        :key：类似于id，如果一个页面多个图片上传控件，可以做区分
        :url：后台上传的url地址
        @close：关闭上传组件
        @crop-upload-success：上传成功后的回调 -->
            <image-cropper
                          v-show="imagecropperShow"
                          :width="300"
                          :height="300"
                          :key="imagecropperKey"
                          :url="BASE_API+'/eduOss/fileOss'"
                          field="file"
                          @close="close"
                          @crop-upload-success="cropSuccess"/>
        </el-form-item>

      <el-form-item>
        <el-button
          :disabled="saveBtnDisabled"
          type="primary"
          @click="saveOrUpdate"
          >保存</el-button
        >
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
import teacher from "@/api/teacher/teacher"
//引入组件
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'

export default {
  //声明组件
  components: { ImageCropper, PanThumb },
  data() {
    return {
      teacher: {
        avatar:''
      },

      //上传组件是否弹框
      imagecropperShow:false,
      imagecropperKey:0,//上传组件key值
      BASE_API:process.env.BASE_API,//接口Api地址
      saveBtnDisabled:false//保存按钮是否禁用

    };
  },

  created() {//页面渲染之前执行
    this.init();
  },

  watch: {//监听
    $route(to, from) {
      //路由变化方式，路由发生变化就会执行
      this.init();
    },
  },

  methods: {
    close(){//关闭上传弹框
      this.imagecropperShow=false
      this.imagecropperKey=this.imagecropperKey+1
    },
    cropSuccess(data){//上传成功方法
      this.imagecropperShow=false
      //上传之后接口返回图片地址
      this.teacher.avatar=data.url
      this.imagecropperKey=this.imagecropperKey+1
    },
    init() {
      //判断路径中是否有id值
      if (this.$route.params && this.$route.params.id) {
        //从路径中获取id值
        const id = this.$route.params.id;
        //调用根据id查询的方法
        this.getInfo(id);
      } else {
        this.teacher = {};
      }
    },
    //根据id查询讲师信息
    getInfo(id) {
      teacher.getTeacherInfo(id).then((response) => {
        this.teacher = response.data.teacher;
      });
    },

    saveOrUpdate() {
      if (!this.teacher.id) {
        this.addTeacher();
      } else {
        this.updateTeacher();
      }
    },

    //添加讲师方法
    addTeacher() {
      teacher.addTeacher(this.teacher).then((response) => {
        //提示信息
        this.$message({
          type: "success",
          message: "添加成功!",
        });
        //回到列表页面  路由跳转
        this.$router.push({ path: "/teacher/table" });
      });
    },
    //修改讲师
    updateTeacher() {
      teacher.updateTeacher(this.teacher).then((response) => {
        //提示信息
        this.$message({
          type: "success",
          message: "修改成功!",
        });
        //回到列表页面  路由跳转
        this.$router.push({ path: "/teacher/table" });
      });
    },
  },
};
</script>
